“We have begun to contemplate our origins: starstuff pondering the stars; organized assemblages of ten billion billion billion atoms considering the evolution of atoms; tracing the long journey by which, here at least, consciousness arose.”

— Carl Sagan , book Cosmos

53 min 54 sec
Source: We are the local embodiment of a Cosmos grown to selfawareness. We have begun to contemplate our origins: starstuff pondering the stars; organized assemblages of ten billion billion billion atoms considering the evolution of atoms; tracing the long journey by which, here at least, consciousness arose. Our loyalties are to the species and the planet. We speak for Earth. Our obligation to survive is owed not just to ourselves but also to that Cosmos, ancient and vast, from which we spring.
Context: And we who embody the local eyes and ears and thoughts and feelings of the cosmos we've begun, at last, to wonder about our origins. Star stuff, contemplating the stars organized collections of 10 billion-billion-billion atoms contemplating the evolution of matter tracing that long path by which it arrived at consciousness here on the planet Earth and perhaps, throughout the cosmos.

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Carl Sagan 365

American astrophysicist, cosmologist, author and science ed… 1934–1996

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Carl Sagan (1934–1996) American astrophysicist, cosmologist, author and science educator

List of misquotations
Billions and Billions: Thoughts on Life and Death at the Brink of the Millenium (1997)

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Carl Sagan book Cosmos

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“Looked at from the perspective of twentieth-century earth, we see three great stages in the dynamic process of the universe. To this whole process, as it spreads out over perhaps ten billion years of time and ten billion light years of space, we give the name evolution, and we see three great patterns within it. The first is physical evolution.”

Kenneth E. Boulding (1910–1993) British-American economist

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Source: 1970s, Ecodynamics: A New Theory Of Societal Evolution, 1978, p. 28

“A billion here, a billion there, pretty soon, you're talking real money.”

Everett Dirksen (1896–1969) United States Army officer

Although often quoted, it seems Dirksen never actually said this. The Dirksen Congressional Research Center made an extensive search https://web.archive.org/web/20140127115225/http://www.dirksencenter.org:80/print_emd_billionhere.htm when fully 25% of enquiries to them were about the quotation. They could find Dirksen did say "a billion here, a billion there", and things close to that, but not the "pretty soon you're talking real money" part. They had one gentleman report to them he had asked Dirksen about it on an airplane trip and received the reply: "Oh, I never said that. A newspaper fella misquoted me once, and I thought it sounded so good that I never bothered to deny it."
The Yale Book of Quotations cites a similar statement in The New York Times on Jan. 10, 1938: "Well, now, about this new budget. It’s a billion here and a billion there, and by and by it begins to mount up into money." https://books.google.com/books?id=ck6bXqt5shkC&lpg=PP1&dq=%22fred%20r.%20shapiro%22%20yale%20book%20of%20quotations&pg=PA206#v=onepage&q=%22everett%20m.%20dirksen%22&f=false
Misattributed